baber/WOPTO huggingface dataset:
Patent GB-186999-A (GB)
Title: Improvements in and relating to friction clutches
IPC: F16D17/00
Filed: 1921-07-08
Abstract: 186,999. Rivers, J. H., and Armstrong, Whitworth, & Co., Ltd., Sir W. G. July 8, 1921. Clutches, friction.-Wedges 13, 13<a> are connected by a link 14 and are arranged loosely between an outer driven drum 23 and segments 1, 1<a>, which turn on pivots 2 on a flanged sleeve secured to the driving-shaft and are moved outwards to press the wedges into engagement with the drum by an axially sliding wedge 10 engaging rollers 6, 6<a> on blocks 9, 9<a> secured to the segment ends. The wedges 13, 13a tend to move to disengagement position under the influence of a lever 16 connected by a spring 15 to one segment and pivoted on a pin 18 in the other, so that its free end engages an adjustable screw 17 on the wedge 13, motion being limited by a screw 21 in the wedge 13<a> engaging a slot 22 in the flanged driving-sleeve. The lever 16 is engaged by a projection moving with the wedge 10 to remove the spring pressure from the wedges when the clutch is in operation. The friction between the drum and wedges is arranged to be greater than that between the wedges and segments, for example by the use of surfaces grooved and smoothed respectively, or by providing roller bearings between the wedges and segments; retardation of the drum 23 then increases theclutching grip.
Patent GB-749316-A (GB)
Title: Improvements in or relating to electromagnetic relays
IPC: H01H1/58
Filed: 1953-07-06
Abstract: 749,316. Electromagnetic switches. BERNSTEIN, A. C., SEAMAN; P. H., and KARR, N. A. July 6, 1953 [July 19, 1952], No. 18712/53. Class 38(5) The armature 30 of a relay is biased to the position shown by a permanent magnet 26. In the form shown two U-shaped cores 11, 12 have their adjacent legs clamped on opposite sides of a brass bar 13 and surrounded by the relay coil 90. The armature is centrally pivoted at 35 and carries contacts 44, 45 adapted to bridge contacts 57 and 60 respectively according to its position. When the coil is energized the flux induced in the R.H. magnetic circuit 12 opposes the flux there due to the permanent magnet 26 while the flux in the L.H. magnetic circuit 11 tends to rotate the armature counter-clockwise. The fixed and moving contacts may be made by printedcircuit technique. The insulating plate 43 supporting the moving contacts is slightly flexible.
Patent GB-991274-A (GB)
Title: Transformers
IPC: H01F41/12
Filed: 1963-05-10
Abstract: 991,274. Transformers. SCIAKY S.A. May 10, 1963 [May 10, 1962], No. 18722/63. Heading H1T. A transformer winding arrangement having one or more primaries 16, 17 (Fig. 1) and at least one plate forming a secondary 13, is manufactured by holding the winding parts together with binding material 20 and then placing therein a mould and charging it with moulding material which is subsequently polymerized. The two primaries 16, 17,may be of rolled copper strip and may be placed between two secondary plates (Fig. 2, not shown) or have one secondary plate between them (Fig. 1), the plates having a cooling tube 14 attached. The windings may be separated by spacers 19 and the parts may be stuck together with a resin containing an accelerating agent to assist cold polymerization. The binding 20 which prevents relative movement of the windings may be of tape or glass yarn. The moulding resin may be charged with powdered silica, dolomite, or quartz and polymerized either by stoving, or in the cold state by addition of an accelerating agent, while the mould may provide a potted winding assembly having a cross-section which is circular or rectangular.
Patent GB-785279-A (GB)
Title: Attachments for telephone receivers and the like
IPC: H04M1/215
Filed: 1956-06-16
Abstract: 785,279. Attachments for earpieces. PEDERSEN, A. F. June 16, 1956, No. 18726/56. Drawings to Specification. Class 40 (4). The tube by which an auxiliary earpiece is acoustically coupled to the diaphragm of a telephone receiver is closed at the end remote from the receiver earpiece and is rotatably mounted in the auxiliary earpiece so that a hole in its side may be brought into or out of engagement with a hole in the auxiliary earpiece, thus affording manual volume control to the user of the auxiliary earpiece.
Patent GB-638812-A (GB)
Title: Improvements in and relating to folding and sliding doors
IPC: E06B3/48
Filed: 1948-07-13
Abstract: 638,812. Sliding doors. EDUCATIONAL SUPPLY ASSOCIATION, Ltd., and LEONARD, J. W. July 13, 1948, No. 18772. [Class 20 (iii)] A folding-sliding door of very large size, for example for an aircraft hanger, which comprises a number of columns supported at the bottom on a guide track and guided at the top between parallel guides, adjacent columns being hingedly connected to a pair of mutually hinged leaves which, when the door is extended, form a series of shallow Vees across the opening, is prevented from canting sideways in the plane of the door opening by two cables, stretched between anchorages near the top corners of the door frame and passing alternately under and over, a pair of pulleys mounted transversely on the top of each column, one cable of the pair passing over one pulley and the second cable passing under the other on each column. In the form shown, the door opening is closed by a number of separate door sections which are arranged serially along the guidetrack running lengthwise of the opening, each section consisting of end posts or " power mullions " 10, which contain driving motors (co-operating with cables) to propel the section individually along the guide track and to open and close the section, between which end posts slide columns 11. A pair of leaves 12, 13, hinged together at 15, are hingedly attached at 14 between each pair of adjacent columns I and between the end posts 10 and adjacent columns. At the top of each column and end post are mounted four long, vertical rollers 17 which engage between horizontal guides 18. Mounted transversely on each roller housing is a pair of freely and independently rotatable horizontal pulleys 23. A pair of cables 24 and 25, adjustably anchored at one end to a bracket 27 and resiliently anchored at the other to a bracket 26, pass under the pulleys 23a on the end post 10 and then alternately over and under pulleys 23 on the columns I the cables being arranged so that at each column one cable passes over one pulley 23, whilst the other cable passes under the other pulley of the pair. With this arrangement, the columns are free to move towards or away from each other, the cables counteracting the tendency, found in large doors of this type, for the columns to cant sideways, a tendency which is particularly apparent when the door is nearly collapsed.
Patent GB-1363725-A (GB)
Title: Calcium magnesium silicate hydrates
IPC: C04B35/22
Filed: 1971-06-03
Abstract: 1363725 Calcium magnesium silicate hydrates RHEINISCHE KALKSTEINWERKE GmbH 3 June 1971 [9 June 1970 28 July 1970] 18787/71 Heading C1A Calcium magnesium silicate hydrates are prepared by reacting oxides or hydroxides of Ca and Mg in a molar ratio of CaO : MgO of 0À5 to 1À5 hydrothermally with silica in a molar ratio of CaO : SiO2 of 1À5 to 2À5 in the presence of water at 180‹ to 230‹ C. and may be further treated with CO2 (e.g. by gassing the product with CO2) to form a carbonated calcium magnesium silicate hydrate containing 2À0 to 25% by weight of CO2 based on the weight of silicate excluding its water content and having the composition based on analysis after heating to remove the CO2 and excluding the water content of CaO 40À8 to 47À9% by weight, MgO 17À4 to 37À7% by weight and SiO2 20À4 to 39À0% by weight.
Patent GB-1471450-A (GB)
Title: Method and apparatus for determining liquid flow rate
IPC: E21B47/10
Filed: 1974-04-30
Abstract: 1471450 Measuring liquid flow-rate SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 30 April 1974 [2 May 1973] 18835/74 Heading G1N Apparatus for measuring liquid flow-rate in a fluid line 10 carrying a liquid-gas flow includes a pressure transducer 11 sensing pressure variations in the line in excess of a given frequency and producing an electric signal to an RMS voltmeter 15 which connects with an integrator 18 and strip chart recorder 19. The invention is said to be based on the discovery that the variation with respect to time in the fluid-pressure, in an oil/gas two-phase flow system, during turbulent flow can be correlated with variations with respect to time in the liquid content of the two-phase flow. The pressure turbulence of a liquid is from ten to one hundred times that of gas flow so the apparatus is relatively insensitive to gas flow. The apparatus may be used to control the operation of artificial lift means in an oil/gas producing well.
Patent GB-666350-A (GB)
Title: Apparatus for automatically stopping an alternator upon removal of its load
IPC: H02J3/38
Filed: 1949-07-18
Abstract: 666,350. Self-contained supply and consumption systems. LORD, R. E. C., and SIDE, G. A. July 18, 1949, No. 18918/49. Class 38 (iv). To initiate stopping of the prime-mover in response to absence of load current in a selfcontained system comprising an alternator feeding one or more load circuits, the load terminals are shunted by a thermionic valve in series with the winding of a relay having contacts controlling a stopping circuit, the arrangement being such that the valve is maintained cut-off and the relay de-energized so long as load current flows by an anti-phase voltage applied to the grid of the valve and derived from the load current. When load current ceases, the absence of grid voltage allows the valve to conduct and energize the " stopping relay. In the automatic starting and stopping system shown, closure of the load circuit completes an energizing circuit for a relay A over contacts M1 M2, F2 and the engine starter battery. Relay B picks up in consequence of closure of A1 and, at its single contact B1, completes the starter motor circuit for the engine. Contact A2 of relay A completes the cathode-heater circuit of a diode V1, which circuit also includes resistors R1, VR1 for prolonging the period required for the cathode to reach emission temperature. After this period, which is sufficient for the engine to become self-running, a relay C in the anode circuit of V1 responds and opens its contacts Cl to de-energize the starting relay B. Connection of the alternator to the load circuit and disconnection of the battery from the load circuit then occurs, under the control of a relay M responsive to the alternator voltage and having a normally open " load contact " M3 in addition to the normally closed contacts M1, M2. A triode V2 in series with a relay winding E shunts the load terminals, this valve normally being " held-off " by a grid voltage obtained from a current transformer CT1 carrying the load current. When load current ceases, V2 conducts, relay E is energized (chatter of its contacts being prevented by condenser K2) and its contacts E1 connect the heater of a diode V3 across the battery in series with a resistor R2. Relay F in the anode circuit of the diode becomes energized, its contacts F1 closing a circuit for stopping the alternator and its contacts F2 opening to prevent re-energization of relay A by contacts M2 when the machine has slowed down sufficiently for relay M to drop out. The last causes relay E to drop out; its contacts E1 then place a further resistor VR2 in the heater circuit of V3. After a time sufficient for the machine to come to rest, VR2 has so reduced the cathode emission of V3 that relay F drops out and restores the circuits to their initial conditions in readiness for re-starting when the load circuit is again closed.
Patent GB-1030332-A (GB)
Title: Improvements relating to builders' props
Inventor: SHAW LESLIE RALPH
IPC: E04G21/26
Filed: 1963-05-14
Abstract: 1,030,332. Telescopic props. BLOXWICH LOCK & STAMPING CO. Ltd. May 12, 1964 [May 14, 1963], No. 18976/63. Heading E1E. Attachment plates 17 at each end of a telescopic builder's prop are hinged at 20 to members 18, 25 rotatable about the prop axis, the member 25 comprising a screw threaded into the tube 10 to give fine adjustment. Coarse adjustment may be effected by transverse pin and hole connections 12-13. The pin and hole connection 12-13 may be replaced by a transverse pin 13, Fig. 7 (not shown) passing through a slot 30 in the outer tube and engaged by nuts 31 threaded thereon. In a further modification one plate 17 is replaced by a plate having an upstanding boss rotatable therein, the hinge pin 20 being mounted transversely in the boss. The Specification also describes a pair of end fittings screwable to a wooden or other strut to form a prop, the end fittings incorporating pivoted attachment plates similar to the plates 17.
Patent GB-661337-A (GB)
Title: Rolling mill with pass adjustment means
IPC: B21B31/26
Filed: 1949-07-19
Abstract: 661,337. Rolling. MOLLER & NEUMANN SOC. AR.L. July 19, 1949 [July 19, 1948], No. 18991/49. Class 83 (iv). In a rolling-mill, the roll chocks are adjusted verticcally and horizontally by tapering arcuate wedge members 13, 14, the surfaces of which are defined by portions of the peripheries of two eccentrically disposed cylinders. The convex face of each wedge is provided with a toothed rim or the like which is adapted to be engaged by toothed wheels, spiral gears or the like, and the roll chocks are held against the wedge members by springs 12.
Patent GB-258707-A (GB)
Title: Improvements in radio receiving systems
IPC: H04B1/26
Filed: 1925-07-27
Abstract: 258,707. Western Electric Co., Ltd., (Bell Telephone Laboratories, Inc.). July 27, 1925. Thermionic heterodyne receivers.-In a wireless receiver in which the received signals are combined with, or interact with. locally generated oscillations, the local oscillator is controlled bv a piezo-electric crystal. A detector valve 15, Fig. 1. oscillates at a frequency determined bv a piezo-electric device 14 and the oscillations combine with the oscillations of the signals it is desired to receive by an aerial 10 to produce lowfrequency oscillations which are fed to an amplifying valve 20 through a transformer 21. According to modifications the first valve is a high-frequency amplifying valve and the second an oscillating detecting valve, and the valves are connected by resistance-capacity coupling or a highfrequency transformer. Separate oscillating and detecting valves may be provided. In a supersonic heterodyne receiver, Fig. 6, the oscillation of a detecting-valve 59 is controlled by a piezoelectric device 51 and the desired band of resultant frequencies is selected by a filter 55 connected to an intermediate-frequency amplifier 56 and a detector and low-frequency amplifier 57. According to a modification a high-frequency amplifier is placed before, and a detector and lowfrequency amplifier after, the oscillating detecting valve. Multiplex signalling.-In a multiplex carriersuppression system in which the side bands corresponding for example to three carrier frequencies are transmitted along lines 71, Fig. 8, a valve 74 oscillates at the frequency of the carrier wave of the desired signal according to which of piezo-electric devices 81, 82. 83 is switched into circuit, and the output of the valve is connected to a low-frequency receiving set by lines 77. According to a modification a separate oscillator is provided.
Patent GB-656235-A (GB)
Title: Improvements in or relating to printing plates, contrast images for making printing plates and method for making the images
IPC: G03F1/68
Filed: 1947-07-17
Abstract: 656,235. Photo-mechanical printing plates. INTERCHEMICAL CORPORATION. July 17, 1947, No. 19108. Convention date, July 5, 1940. [Class 98 (ii)] [Also in Group XL (b)] The continuous variation of tone of an original representation is reproduced by photoelectric scanning and reproducing apparatus (see Group XL (b)) in the form of a recorded photographic image, or a printing plate made therefrom, by means of spaced rectangular dots of black and white on light and dark backgrounds respectively, in which both dimensions of the dots and the spacing between the centres of the dots are varied with the tone of the original. The image plates may be used in typographical or lithographical processes, Figs. 1, 2, 3 (not shown), and in the case of an intaglio process, Figs. 4, 5, white dividing lines 5a of small width are formed in the dark areas to produce narrow ridges 5 in the intaglio plate.
Patent GB-117396-A (GB)
Title: Improvements in and connected with Button-hole Stitching Machines.
Inventor: RUSSELL JOHN
IPC: D05B35/12
Filed: 1917-12-27
Abstract: 117,396. Russell, J. Dec. 27, 1917. Sewing-machines; marking attachments. -The space between adjacent buttonholes is regulated by placing a stitched buttonhole over a guide plate or finger L on a guide-arm H adjustable on a bar J to which it is clamped by a screw K at the required distance from the needle. The attachment may be fixed to the sole-plate of the machine or to the work-carrying plate according to the type of machine.
Patent GB-461002-A (GB)
Title: Improvements in or relating to closed heating systems employing a circulating heating liquid
IPC: F24D3/02
Filed: 1935-07-04
Abstract: 461,002. Fluid-pressure servomotor-control systems. FARRER, J. O., and KOCH, E. A. J. July 4, 1935, No. 19131. [Class 135] [Also in Group XIII] In a liquid heating system comprising a generator or heater 1, flow and return pipes 2, 3 respectively, consumers 4, and a circu. lating-pump 5, the return pipe is provided with a throttle valve 6 the spindle of which is secured to a diaphragm 7, Fig. 2, loaded on its under side by a spring and exposed on its upper side to the pressure of a liquid the flow of which is controlled by a valve 10 disposed in a chamber having a connection 17 to a vessel containing liquid at a constant pressure. The valve 10 is attached to a diaphragm 12 exposed on its upper side through a pipe 14 to the pressure on the delivery side of the pump, and on its under side, which is loaded by a spring, to the pressure on the suction side of the pump. When the suction pressure falls due to reduced flow, the valve 10 opens and admits liquid to the upper side of the diaphragm 7 thus effecting movement of the valve 6 towards its closed position. The space above the diaphragm 7 is provided with a leak orifice 19. By the above arrangement, a constant pressure differential is maintained between the suction and delivery sides of the pump. In a modification, the valve 10 is also controlled by a second diaphragm 24, Fig. 4, subjected on its opposite sides to the pressures on theopposite sides of an orifice plate 26 in the flow pipe.
Patent GB-957245-A (GB)
Title: Improvements in or relating to pressure exchangers
Inventor: KENTFIELD JOHN ALAN CHARLES
IPC: F04F13/00
Filed: 1962-05-17
Abstract: 957,245. Pressure exchangers. POWER JETS (RESEARCH & DEVELOPMENT) Ltd. April 23, 1963 [May 17, 1962], No. 19154/62. Addition to 936,427. Heading F1N. In a pressure exchanger having means for varying the volume of the cells during their motion relative to the ducting as claimed in parent Specification, heat input means e.g., a combustion chamber 14 is interposed in ducting connecting the high pressure outlet and inlet ports 6, 11 and an off-take duct 12 is provided upstream of the combustion chamber 14. The off-take is controlled by a valve 13 which is open when the exchanger is used as a compressor and only sufficient air is fed to chamber 14 to provide energy for rotating the cell ring 1 and compressing the air. Valve 13 is closed for the production of shaft power.
Patent GB-754887-A (GB)
Title: Improvements in or relating to one-piece hollow propeller blades and method of making the same
IPC: B21D53/78
Filed: 1954-06-30
Abstract: 754,887. Making screw propellers. UNITED AIRCRAFT CORPORATION. June 30, 1954 [Nov. 20, 1953], No. 19159/54. Classes 83 (2) and 83 (4). Forging; rolling.-In a method of making hollow propeller blades a hollow blank 16, Figs. 8, 9, formed with longitudinal fins 18, 20 in the region of the leading and trailing edges to be formed is hot and cold worked as by rolling over a mandrel to produce the required length and aerofoil section, the ribs being subsequently removed. The hollow blank 16 may be formed by piercing an elliptical billet 12, Fig. 5, while enclosed in a die 28. The ribs 18, 20 and the root end 24 may be simultaneously formed by the die 28 during the piercing process or may be subsequently machined thereon. Alternatively the blank may be formed by piercing a round or rectangular billet which is subsequently machined inside and out and placed on a mandrel and forced through a drawing die or roller dies to form the elliptical shape and the fins. In the next stage the heated blank is placed on a mandrel 42, Fig. 6, of a push bench actuated by an hydraulic ram 44 and is elongated and formed to the required approximate aerofoil section and taper by pairs of rolls 52 spaced so that the work is in engagement with only one roll pair at a time. The shape of the rolls 52, Fig. 7, is arranged so that a gap is maintained in the region of the leading and trailing edges for shaping the ribs which may be free to expand laterally or are engaged by fixed side guides 55. After completing the roll passes the blank is held at the shaped root end 24 by grippers 54 which strip the blank from the mandrel 42 as it is withdrawn. After heattreatment the cold blank is further elongated by further rolling passes. The blank 62, Fig. 16, is then machined at the root end 64 to the required shape and the end 66 is flattened between dies while the blank wall is supported by internal hydraulic or inert gas pressure. The leading and trailing edges are then machined or ground to the required aerofoil section, the ribs 58, 60, Figs. 24, 26, being wholly or partially removed. The blade is finally heated and formed to the required shape including twist between dies while the interior of the blade is filled with nitrogen under pressure.
Patent GB-720434-A (GB)
Title: Improvements relating to the loading of grit spreaders and like machines, for example in road making
Inventor: DEWHURST HERBERT HENRY
IPC: B60P1/43
Filed: 1952-07-30
Abstract: 720,434. Load-handling ramps. MUNICIPAL APPLIANCES CO., Ltd. June 30, 1953 [July 30, 1952], No. 19207/52. Class 78 (3). A mobile ramp, particularly for towing behind a grit spreading machine to enable a dumping lorry to load grit directly into the hopper of the machine, is provided with spring-loaded retractable wheels which support the unloaded ramp, but which retract and allow the ramp to rest directly on the ground when a lorry is driven thereon. The wheel axles 31 are each mounted on arms 33 pivoted to the ramp at 55 and are urged into the position shown by springs 35, whilst a tow bar 25, which is pivoted to the ramp at 56, is urged downwardly by a spring 29. In a modification (not shown), the ramp is suspended from springs carried by the axles. The ramp comprises a pair of braced tracks 10 provided with horizontal portions 15 and wheel stops 24.
Patent GB-404555-A (GB)
Title: Improvements in heat accumulators
IPC: F24H7/02
Filed: 1933-07-06
Abstract: 404,555. Heat-storing apparatus. WALLDEN, H. O., 33, Birgerjarlsgatan, Stockholm. July 6, 1933, No. 19208. [Class 64 (ii).] In a heat-accumulating block formed of soapstone plates 2 and 3 and provided with heating elements 1 and an insulating cover 4, a part 6 of the cover 4 can swing out to the position shown in the broken lines bring- ing with it the plate 3 so that a large surface is exposed for radiation of heat from the heatstoring mass. A screen 12, provided to minimise loss of heat by convection, carries a catch 14 to hold the flap 6 in place. The block may be arranged beneath a seat 10.